Oh, be very careful about the "$87."
Let the dryer cost x.
Then, the washer costs (x+87)
Together, they cost (x) + (x+87) = 787
2x+87 = 787
2x = 700 [subtract 97 from both sides]
x = 350 [divide both sides by 2]
The dryer cost $350.
Check: The washer cost $437. Together, they cost $787 [good to check, right?]
